Both
POS. Notice no dent above the magazine to keep it from rattling around and feeding right? That's because those recievers were intended to use skinny single stack magazines, and importers hack the mag. hole bigger with dremel tools just to get them to fit standard double stack AK magazines.
The POS part is just my opinion. Someone who has one and never actually used it will surely argue so they don't feel bad about wasting their money.
YES, if your
lucky, and hold the rifle carefully they'll feed fine. Again,
Wonder why they're cheaper???
You'd do better to buy a kit, a 100% reciever, and build the thing yourself, or send off the pieces to be built by a pro.
Do it yourself and you'll stay
well with'in that $500 bucks!
Do three of them, sell off two, and keep the nicest one for yourself for free!